datum_max_float8 datum_max_int32 datum_max_text datum_min_float8 datum_min_int32 datum_min_text datum_sum_double2 datum_sum_double3 datum_sum_double4 datum_sum_float8 ensure_same_temp_subtype_skiplist tbool_tand_combinefn tbool_tand_transfn tbool_tor_combinefn tbool_tor_transfn temporal_extent_combinefn temporal_extent_transfn temporal_tagg_combinefn1 temporal_tagg_finalfn temporal_tcount_combinefn temporal_tcount_transfn tfloat_tmax_combinefn tfloat_tmax_transfn tfloat_tmin_combinefn tfloat_tmin_transfn tfloat_tsum_combinefn tfloat_tsum_transfn tint_tmax_combinefn tint_tmax_transfn tint_tmin_combinefn tint_tmin_transfn tint_tsum_combinefn tint_tsum_transfn tnumber_extent_combinefn tnumber_extent_transfn tnumber_tavg_combinefn tnumber_tavg_finalfn tnumber_tavg_transfn tsequence_tagg_transfn ttext_tmax_combinefn ttext_tmax_transfn ttext_tmin_combinefn ttext_tmin_transfn

datum_sum_double4() Datum datum_sum_double4 ( Datum  l, Datum  r  ) Returns the sum of the two arguments.